Pin timer/token count to right side of spinner line

Problem

During active sessions — especially agent team sessions — the elapsed time and token count in the spinner line jump around constantly as the verb/action text changes length:

* Thinking...  (2m 40s · 197.1k tokens)
* Reading file...  (2m 41s · 197.2k tokens)
* Sock-hopping...  (2m 42s · 197.3k tokens)
* Writing...  (2m 43s · 197.4k tokens)

The time and token info shifts left/right with every verb change because it's inline after the variable-length text. In fast-moving agent team sessions, the verb can change many times per second, making the timer and token count unreadable — they just flicker back and forth.

Proposed Solution

Right-align the timer and token count to the terminal edge, independent of the verb text length:

* Thinking...                          2m 40s · 197.1k tokens
* Reading file...                      2m 41s · 197.2k tokens
* Sock-hopping...                      2m 42s · 197.3k tokens

This way the verb can change freely on the left while the stats stay pinned on the right — similar to how many CLI tools handle progress indicators.

Context

• Most noticeable during agent team (TeamCreate) sessions with multiple agents working in parallel
• The verb updates very frequently during tool use, making the current layout visually noisy
• macOS Terminal / iTerm2, standard terminal widths (80-200+ cols)